/
h2_bundle.go
12061 lines (10913 loc) · 372 KB
/
h2_bundle.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
//go:build !nethttpomithttp2
// Code generated by golang.org/x/tools/cmd/bundle. DO NOT EDIT.
// $ bundle -o=h2_bundle.go -prefix=http2 -tags=!nethttpomithttp2 golang.org/x/net/http2
// Package http2 implements the HTTP/2 protocol.
//
// This package is low-level and intended to be used directly by very
// few people. Most users will use it indirectly through the automatic
// use by the net/http package (from Go 1.6 and later).
// For use in earlier Go versions see ConfigureServer. (Transport support
// requires Go 1.6 or later)
//
// See https://http2.github.io/ for more information on HTTP/2.
//
// See https://http2.golang.org/ for a test server running this code.
//
// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//
package http
import (
"bufio"
"bytes"
"compress/gzip"
"context"
"crypto/rand"
"crypto/tls"
"encoding/binary"
"errors"
"fmt"
"io"
"io/fs"
"log"
"math"
"math/bits"
mathrand "math/rand"
"net"
"net/http/httptrace"
"net/textproto"
"net/url"
"os"
"reflect"
"runtime"
"sort"
"strconv"
"strings"
"sync"
"sync/atomic"
"time"
"golang.org/x/net/http/httpguts"
"golang.org/x/net/http2/hpack"
"golang.org/x/net/idna"
)
// The HTTP protocols are defined in terms of ASCII, not Unicode. This file
// contains helper functions which may use Unicode-aware functions which would
// otherwise be unsafe and could introduce vulnerabilities if used improperly.
// asciiEqualFold is strings.EqualFold, ASCII only. It reports whether s and t
// are equal, ASCII-case-insensitively.
func http2asciiEqualFold(s, t string) bool {
if len(s) != len(t) {
return false
}
for i := 0; i < len(s); i++ {
if http2lower(s[i]) != http2lower(t[i]) {
return false
}
}
return true
}
// lower returns the ASCII lowercase version of b.
func http2lower(b byte) byte {
if 'A' <= b && b <= 'Z' {
return b + ('a' - 'A')
}
return b
}
// isASCIIPrint returns whether s is ASCII and printable according to
// https://tools.ietf.org/html/rfc20#section-4.2.
func http2isASCIIPrint(s string) bool {
for i := 0; i < len(s); i++ {
if s[i] < ' ' || s[i] > '~' {
return false
}
}
return true
}
// asciiToLower returns the lowercase version of s if s is ASCII and printable,
// and whether or not it was.
func http2asciiToLower(s string) (lower string, ok bool) {
if !http2isASCIIPrint(s) {
return "", false
}
return strings.ToLower(s), true
}
// A list of the possible cipher suite ids. Taken from
// https://www.iana.org/assignments/tls-parameters/tls-parameters.txt
const (
http2cipher_TLS_NULL_WITH_NULL_NULL uint16 = 0x0000
http2cipher_TLS_RSA_WITH_NULL_MD5 uint16 = 0x0001
http2cipher_TLS_RSA_WITH_NULL_SHA uint16 = 0x0002
http2cipher_TLS_RSA_EXPORT_WITH_RC4_40_MD5 uint16 = 0x0003
http2cipher_TLS_RSA_WITH_RC4_128_MD5 uint16 = 0x0004
http2cipher_TLS_RSA_WITH_RC4_128_SHA uint16 = 0x0005
http2cipher_TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 uint16 = 0x0006
http2cipher_TLS_RSA_WITH_IDEA_CBC_SHA uint16 = 0x0007
http2cipher_TLS_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0008
http2cipher_TLS_RSA_WITH_DES_CBC_SHA uint16 = 0x0009
http2cipher_TLS_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x000A
http2cipher_TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x000B
http2cipher_TLS_DH_DSS_WITH_DES_CBC_SHA uint16 = 0x000C
http2cipher_TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0x000D
http2cipher_TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x000E
http2cipher_TLS_DH_RSA_WITH_DES_CBC_SHA uint16 = 0x000F
http2cipher_TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x0010
http2cipher_TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0011
http2cipher_TLS_DHE_DSS_WITH_DES_CBC_SHA uint16 = 0x0012
http2cipher_TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0x0013
http2cipher_TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0014
http2cipher_TLS_DHE_RSA_WITH_DES_CBC_SHA uint16 = 0x0015
http2cipher_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x0016
http2cipher_TLS_DH_anon_EXPORT_WITH_RC4_40_MD5 uint16 = 0x0017
http2cipher_TLS_DH_anon_WITH_RC4_128_MD5 uint16 = 0x0018
http2cipher_TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0019
http2cipher_TLS_DH_anon_WITH_DES_CBC_SHA uint16 = 0x001A
http2cipher_TLS_DH_anon_WITH_3DES_EDE_CBC_SHA uint16 = 0x001B
// Reserved uint16 = 0x001C-1D
http2cipher_TLS_KRB5_WITH_DES_CBC_SHA uint16 = 0x001E
http2cipher_TLS_KRB5_WITH_3DES_EDE_CBC_SHA uint16 = 0x001F
http2cipher_TLS_KRB5_WITH_RC4_128_SHA uint16 = 0x0020
http2cipher_TLS_KRB5_WITH_IDEA_CBC_SHA uint16 = 0x0021
http2cipher_TLS_KRB5_WITH_DES_CBC_MD5 uint16 = 0x0022
http2cipher_TLS_KRB5_WITH_3DES_EDE_CBC_MD5 uint16 = 0x0023
http2cipher_TLS_KRB5_WITH_RC4_128_MD5 uint16 = 0x0024
http2cipher_TLS_KRB5_WITH_IDEA_CBC_MD5 uint16 = 0x0025
http2cipher_TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA uint16 = 0x0026
http2cipher_TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA uint16 = 0x0027
http2cipher_TLS_KRB5_EXPORT_WITH_RC4_40_SHA uint16 = 0x0028
http2cipher_TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5 uint16 = 0x0029
http2cipher_TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5 uint16 = 0x002A
http2cipher_TLS_KRB5_EXPORT_WITH_RC4_40_MD5 uint16 = 0x002B
http2cipher_TLS_PSK_WITH_NULL_SHA uint16 = 0x002C
http2cipher_TLS_DHE_PSK_WITH_NULL_SHA uint16 = 0x002D
http2cipher_TLS_RSA_PSK_WITH_NULL_SHA uint16 = 0x002E
http2cipher_TLS_RSA_WITH_AES_128_CBC_SHA uint16 = 0x002F
http2cipher_TLS_DH_DSS_WITH_AES_128_CBC_SHA uint16 = 0x0030
http2cipher_TLS_DH_RSA_WITH_AES_128_CBC_SHA uint16 = 0x0031
http2cipher_TLS_DHE_DSS_WITH_AES_128_CBC_SHA uint16 = 0x0032
http2cipher_TLS_DHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0x0033
http2cipher_TLS_DH_anon_WITH_AES_128_CBC_SHA uint16 = 0x0034
http2cipher_TLS_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0035
http2cipher_TLS_DH_DSS_WITH_AES_256_CBC_SHA uint16 = 0x0036
http2cipher_TLS_DH_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0037
http2cipher_TLS_DHE_DSS_WITH_AES_256_CBC_SHA uint16 = 0x0038
http2cipher_TLS_DHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0039
http2cipher_TLS_DH_anon_WITH_AES_256_CBC_SHA uint16 = 0x003A
http2cipher_TLS_RSA_WITH_NULL_SHA256 uint16 = 0x003B
http2cipher_TLS_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003C
http2cipher_TLS_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x003D
http2cipher_TLS_DH_DSS_WITH_AES_128_CBC_SHA256 uint16 = 0x003E
http2cipher_TLS_DH_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003F
http2cipher_TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 uint16 = 0x0040
http2cipher_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0041
http2cipher_TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0042
http2cipher_TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0043
http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0044
http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0045
http2cipher_TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0046
// Reserved uint16 = 0x0047-4F
// Reserved uint16 = 0x0050-58
// Reserved uint16 = 0x0059-5C
// Unassigned uint16 = 0x005D-5F
// Reserved uint16 = 0x0060-66
http2cipher_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x0067
http2cipher_TLS_DH_DSS_WITH_AES_256_CBC_SHA256 uint16 = 0x0068
http2cipher_TLS_DH_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x0069
http2cipher_TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 uint16 = 0x006A
http2cipher_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x006B
http2cipher_TLS_DH_anon_WITH_AES_128_CBC_SHA256 uint16 = 0x006C
http2cipher_TLS_DH_anon_WITH_AES_256_CBC_SHA256 uint16 = 0x006D
// Unassigned uint16 = 0x006E-83
http2cipher_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0084
http2cipher_TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0085
http2cipher_TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0086
http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0087
http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0088
http2cipher_TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0089
http2cipher_TLS_PSK_WITH_RC4_128_SHA uint16 = 0x008A
http2cipher_TLS_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x008B
http2cipher_TLS_PSK_WITH_AES_128_CBC_SHA uint16 = 0x008C
http2cipher_TLS_PSK_WITH_AES_256_CBC_SHA uint16 = 0x008D
http2cipher_TLS_DHE_PSK_WITH_RC4_128_SHA uint16 = 0x008E
http2cipher_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x008F
http2cipher_TLS_DHE_PSK_WITH_AES_128_CBC_SHA uint16 = 0x0090
http2cipher_TLS_DHE_PSK_WITH_AES_256_CBC_SHA uint16 = 0x0091
http2cipher_TLS_RSA_PSK_WITH_RC4_128_SHA uint16 = 0x0092
http2cipher_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x0093
http2cipher_TLS_RSA_PSK_WITH_AES_128_CBC_SHA uint16 = 0x0094
http2cipher_TLS_RSA_PSK_WITH_AES_256_CBC_SHA uint16 = 0x0095
http2cipher_TLS_RSA_WITH_SEED_CBC_SHA uint16 = 0x0096
http2cipher_TLS_DH_DSS_WITH_SEED_CBC_SHA uint16 = 0x0097
http2cipher_TLS_DH_RSA_WITH_SEED_CBC_SHA uint16 = 0x0098
http2cipher_TLS_DHE_DSS_WITH_SEED_CBC_SHA uint16 = 0x0099
http2cipher_TLS_DHE_RSA_WITH_SEED_CBC_SHA uint16 = 0x009A
http2cipher_TLS_DH_anon_WITH_SEED_CBC_SHA uint16 = 0x009B
http2cipher_TLS_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009C
http2cipher_TLS_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009D
http2cipher_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009E
http2cipher_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009F
http2cipher_TLS_DH_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x00A0
http2cipher_TLS_DH_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x00A1
http2cipher_TLS_DHE_DSS_WITH_AES_128_GCM_SHA256 uint16 = 0x00A2
http2cipher_TLS_DHE_DSS_WITH_AES_256_GCM_SHA384 uint16 = 0x00A3
http2cipher_TLS_DH_DSS_WITH_AES_128_GCM_SHA256 uint16 = 0x00A4
http2cipher_TLS_DH_DSS_WITH_AES_256_GCM_SHA384 uint16 = 0x00A5
http2cipher_TLS_DH_anon_WITH_AES_128_GCM_SHA256 uint16 = 0x00A6
http2cipher_TLS_DH_anon_WITH_AES_256_GCM_SHA384 uint16 = 0x00A7
http2cipher_TLS_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00A8
http2cipher_TLS_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00A9
http2cipher_TLS_DHE_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00AA
http2cipher_TLS_DHE_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00AB
http2cipher_TLS_RSA_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00AC
http2cipher_TLS_RSA_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00AD
http2cipher_TLS_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00AE
http2cipher_TLS_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00AF
http2cipher_TLS_PSK_WITH_NULL_SHA256 uint16 = 0x00B0
http2cipher_TLS_PSK_WITH_NULL_SHA384 uint16 = 0x00B1
http2cipher_TLS_DHE_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00B2
http2cipher_TLS_DHE_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00B3
http2cipher_TLS_DHE_PSK_WITH_NULL_SHA256 uint16 = 0x00B4
http2cipher_TLS_DHE_PSK_WITH_NULL_SHA384 uint16 = 0x00B5
http2cipher_TLS_RSA_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00B6
http2cipher_TLS_RSA_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00B7
http2cipher_TLS_RSA_PSK_WITH_NULL_SHA256 uint16 = 0x00B8
http2cipher_TLS_RSA_PSK_WITH_NULL_SHA384 uint16 = 0x00B9
http2cipher_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BA
http2cipher_TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BB
http2cipher_TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BC
http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BD
http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BE
http2cipher_TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BF
http2cipher_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C0
http2cipher_TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C1
http2cipher_TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C2
http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C3
http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C4
http2cipher_TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C5
// Unassigned uint16 = 0x00C6-FE
http2cipher_TLS_EMPTY_RENEGOTIATION_INFO_SCSV uint16 = 0x00FF
// Unassigned uint16 = 0x01-55,*
http2cipher_TLS_FALLBACK_SCSV uint16 = 0x5600
// Unassigned uint16 = 0x5601 - 0xC000
http2cipher_TLS_ECDH_ECDSA_WITH_NULL_SHA uint16 = 0xC001
http2cipher_TLS_ECDH_ECDSA_WITH_RC4_128_SHA uint16 = 0xC002
http2cipher_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC003
http2cipher_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xC004
http2cipher_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xC005
http2cipher_TLS_ECDHE_ECDSA_WITH_NULL_SHA uint16 = 0xC006
http2cipher_TLS_ECDHE_ECDSA_WITH_RC4_128_SHA uint16 = 0xC007
http2cipher_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC008
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xC009
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xC00A
http2cipher_TLS_ECDH_RSA_WITH_NULL_SHA uint16 = 0xC00B
http2cipher_TLS_ECDH_RSA_WITH_RC4_128_SHA uint16 = 0xC00C
http2cipher_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC00D
http2cipher_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC00E
http2cipher_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC00F
http2cipher_TLS_ECDHE_RSA_WITH_NULL_SHA uint16 = 0xC010
http2cipher_TLS_ECDHE_RSA_WITH_RC4_128_SHA uint16 = 0xC011
http2cipher_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC012
http2cipher_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC013
http2cipher_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC014
http2cipher_TLS_ECDH_anon_WITH_NULL_SHA uint16 = 0xC015
http2cipher_TLS_ECDH_anon_WITH_RC4_128_SHA uint16 = 0xC016
http2cipher_TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA uint16 = 0xC017
http2cipher_TLS_ECDH_anon_WITH_AES_128_CBC_SHA uint16 = 0xC018
http2cipher_TLS_ECDH_anon_WITH_AES_256_CBC_SHA uint16 = 0xC019
http2cipher_TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01A
http2cipher_TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01B
http2cipher_TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01C
http2cipher_TLS_SRP_SHA_WITH_AES_128_CBC_SHA uint16 = 0xC01D
http2cipher_TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC01E
http2cipher_TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA uint16 = 0xC01F
http2cipher_TLS_SRP_SHA_WITH_AES_256_CBC_SHA uint16 = 0xC020
http2cipher_TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC021
http2cipher_TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA uint16 = 0xC022
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC023
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC024
http2cipher_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC025
http2cipher_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC026
http2cipher_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC027
http2cipher_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC028
http2cipher_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC029
http2cipher_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC02A
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02B
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC02C
http2cipher_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02D
http2cipher_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC02E
http2cipher_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02F
http2cipher_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC030
http2cipher_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC031
http2cipher_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC032
http2cipher_TLS_ECDHE_PSK_WITH_RC4_128_SHA uint16 = 0xC033
http2cipher_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0xC034
http2cipher_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA uint16 = 0xC035
http2cipher_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA uint16 = 0xC036
http2cipher_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0xC037
http2cipher_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0xC038
http2cipher_TLS_ECDHE_PSK_WITH_NULL_SHA uint16 = 0xC039
http2cipher_TLS_ECDHE_PSK_WITH_NULL_SHA256 uint16 = 0xC03A
http2cipher_TLS_ECDHE_PSK_WITH_NULL_SHA384 uint16 = 0xC03B
http2cipher_TLS_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC03C
http2cipher_TLS_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC03D
http2cipher_TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC03E
http2cipher_TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC03F
http2cipher_TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC040
http2cipher_TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC041
http2cipher_TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC042
http2cipher_TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC043
http2cipher_TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC044
http2cipher_TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC045
http2cipher_TLS_DH_anon_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC046
http2cipher_TLS_DH_anon_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC047
http2cipher_TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC048
http2cipher_TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC049
http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04A
http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04B
http2cipher_TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04C
http2cipher_TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04D
http2cipher_TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04E
http2cipher_TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04F
http2cipher_TLS_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC050
http2cipher_TLS_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC051
http2cipher_TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC052
http2cipher_TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC053
http2cipher_TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC054
http2cipher_TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC055
http2cipher_TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC056
http2cipher_TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC057
http2cipher_TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC058
http2cipher_TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC059
http2cipher_TLS_DH_anon_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05A
http2cipher_TLS_DH_anon_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05B
http2cipher_TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05C
http2cipher_TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05D
http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05E
http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05F
http2cipher_TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC060
http2cipher_TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC061
http2cipher_TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC062
http2cipher_TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC063
http2cipher_TLS_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC064
http2cipher_TLS_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC065
http2cipher_TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC066
http2cipher_TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC067
http2cipher_TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC068
http2cipher_TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC069
http2cipher_TLS_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06A
http2cipher_TLS_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06B
http2cipher_TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06C
http2cipher_TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06D
http2cipher_TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06E
http2cipher_TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06F
http2cipher_TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC070
http2cipher_TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC071
http2cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC072
http2cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC073
http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC074
http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC075
http2cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC076
http2cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC077
http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC078
http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC079
http2cipher_TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07A
http2cipher_TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07B
http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07C
http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07D
http2cipher_TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07E
http2cipher_TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07F
http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC080
http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC081
http2cipher_TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC082
http2cipher_TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC083
http2cipher_TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC084
http2cipher_TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC085
http2cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC086
http2cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC087
http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC088
http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC089
http2cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08A
http2cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08B
http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08C
http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08D
http2cipher_TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08E
http2cipher_TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08F
http2cipher_TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC090
http2cipher_TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC091
http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC092
http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC093
http2cipher_TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC094
http2cipher_TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC095
http2cipher_TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC096
http2cipher_TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC097
http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC098
http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC099
http2cipher_TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC09A
http2cipher_TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC09B
http2cipher_TLS_RSA_WITH_AES_128_CCM uint16 = 0xC09C
http2cipher_TLS_RSA_WITH_AES_256_CCM uint16 = 0xC09D
http2cipher_TLS_DHE_RSA_WITH_AES_128_CCM uint16 = 0xC09E
http2cipher_TLS_DHE_RSA_WITH_AES_256_CCM uint16 = 0xC09F
http2cipher_TLS_RSA_WITH_AES_128_CCM_8 uint16 = 0xC0A0
http2cipher_TLS_RSA_WITH_AES_256_CCM_8 uint16 = 0xC0A1
http2cipher_TLS_DHE_RSA_WITH_AES_128_CCM_8 uint16 = 0xC0A2
http2cipher_TLS_DHE_RSA_WITH_AES_256_CCM_8 uint16 = 0xC0A3
http2cipher_TLS_PSK_WITH_AES_128_CCM uint16 = 0xC0A4
http2cipher_TLS_PSK_WITH_AES_256_CCM uint16 = 0xC0A5
http2cipher_TLS_DHE_PSK_WITH_AES_128_CCM uint16 = 0xC0A6
http2cipher_TLS_DHE_PSK_WITH_AES_256_CCM uint16 = 0xC0A7
http2cipher_TLS_PSK_WITH_AES_128_CCM_8 uint16 = 0xC0A8
http2cipher_TLS_PSK_WITH_AES_256_CCM_8 uint16 = 0xC0A9
http2cipher_TLS_PSK_DHE_WITH_AES_128_CCM_8 uint16 = 0xC0AA
http2cipher_TLS_PSK_DHE_WITH_AES_256_CCM_8 uint16 = 0xC0AB
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CCM uint16 = 0xC0AC
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CCM uint16 = 0xC0AD
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8 uint16 = 0xC0AE
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8 uint16 = 0xC0AF
// Unassigned uint16 = 0xC0B0-FF
// Unassigned uint16 = 0xC1-CB,*
// Unassigned uint16 = 0xCC00-A7
http2cipher_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCA8
http2cipher_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCA9
http2cipher_TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAA
http2cipher_TLS_PSK_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAB
http2cipher_TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAC
http2cipher_TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAD
http2cipher_TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAE
)
// isBadCipher reports whether the cipher is blacklisted by the HTTP/2 spec.
// References:
// https://tools.ietf.org/html/rfc7540#appendix-A
// Reject cipher suites from Appendix A.
// "This list includes those cipher suites that do not
// offer an ephemeral key exchange and those that are
// based on the TLS null, stream or block cipher type"
func http2isBadCipher(cipher uint16) bool {
switch cipher {
case http2cipher_TLS_NULL_WITH_NULL_NULL,
http2cipher_TLS_RSA_WITH_NULL_MD5,
http2cipher_TLS_RSA_WITH_NULL_SHA,
http2cipher_TLS_RSA_EXPORT_WITH_RC4_40_MD5,
http2cipher_TLS_RSA_WITH_RC4_128_MD5,
http2cipher_TLS_RSA_WITH_RC4_128_SHA,
http2cipher_TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5,
http2cipher_TLS_RSA_WITH_IDEA_CBC_SHA,
http2cipher_TLS_RSA_EXPORT_WITH_DES40_CBC_SHA,
http2cipher_TLS_RSA_WITH_DES_CBC_SHA,
http2cipher_TLS_RSA_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA,
http2cipher_TLS_DH_DSS_WITH_DES_CBC_SHA,
http2cipher_TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA,
http2cipher_TLS_DH_RSA_WITH_DES_CBC_SHA,
http2cipher_TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA,
http2cipher_TLS_DHE_DSS_WITH_DES_CBC_SHA,
http2cipher_TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA,
http2cipher_TLS_DHE_RSA_WITH_DES_CBC_SHA,
http2cipher_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_DH_anon_EXPORT_WITH_RC4_40_MD5,
http2cipher_TLS_DH_anon_WITH_RC4_128_MD5,
http2cipher_TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA,
http2cipher_TLS_DH_anon_WITH_DES_CBC_SHA,
http2cipher_TLS_DH_anon_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_KRB5_WITH_DES_CBC_SHA,
http2cipher_TLS_KRB5_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_KRB5_WITH_RC4_128_SHA,
http2cipher_TLS_KRB5_WITH_IDEA_CBC_SHA,
http2cipher_TLS_KRB5_WITH_DES_CBC_MD5,
http2cipher_TLS_KRB5_WITH_3DES_EDE_CBC_MD5,
http2cipher_TLS_KRB5_WITH_RC4_128_MD5,
http2cipher_TLS_KRB5_WITH_IDEA_CBC_MD5,
http2cipher_TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA,
http2cipher_TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA,
http2cipher_TLS_KRB5_EXPORT_WITH_RC4_40_SHA,
http2cipher_TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5,
http2cipher_TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5,
http2cipher_TLS_KRB5_EXPORT_WITH_RC4_40_MD5,
http2cipher_TLS_PSK_WITH_NULL_SHA,
http2cipher_TLS_DHE_PSK_WITH_NULL_SHA,
http2cipher_TLS_RSA_PSK_WITH_NULL_SHA,
http2cipher_TLS_RSA_WITH_AES_128_CBC_SHA,
http2cipher_TLS_DH_DSS_WITH_AES_128_CBC_SHA,
http2cipher_TLS_DH_RSA_WITH_AES_128_CBC_SHA,
http2cipher_TLS_DHE_DSS_WITH_AES_128_CBC_SHA,
http2cipher_TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
http2cipher_TLS_DH_anon_WITH_AES_128_CBC_SHA,
http2cipher_TLS_RSA_WITH_AES_256_CBC_SHA,
http2cipher_TLS_DH_DSS_WITH_AES_256_CBC_SHA,
http2cipher_TLS_DH_RSA_WITH_AES_256_CBC_SHA,
http2cipher_TLS_DHE_DSS_WITH_AES_256_CBC_SHA,
http2cipher_TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
http2cipher_TLS_DH_anon_WITH_AES_256_CBC_SHA,
http2cipher_TLS_RSA_WITH_NULL_SHA256,
http2cipher_TLS_RSA_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_RSA_WITH_AES_256_CBC_SHA256,
http2cipher_TLS_DH_DSS_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_DH_RSA_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_DHE_DSS_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA,
http2cipher_TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA,
http2cipher_TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA,
http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA,
http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA,
http2cipher_TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA,
http2cipher_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_DH_DSS_WITH_AES_256_CBC_SHA256,
http2cipher_TLS_DH_RSA_WITH_AES_256_CBC_SHA256,
http2cipher_TLS_DHE_DSS_WITH_AES_256_CBC_SHA256,
http2cipher_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256,
http2cipher_TLS_DH_anon_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_DH_anon_WITH_AES_256_CBC_SHA256,
http2cipher_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA,
http2cipher_TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA,
http2cipher_TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA,
http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA,
http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA,
http2cipher_TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA,
http2cipher_TLS_PSK_WITH_RC4_128_SHA,
http2cipher_TLS_PSK_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_PSK_WITH_AES_128_CBC_SHA,
http2cipher_TLS_PSK_WITH_AES_256_CBC_SHA,
http2cipher_TLS_DHE_PSK_WITH_RC4_128_SHA,
http2cipher_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_DHE_PSK_WITH_AES_128_CBC_SHA,
http2cipher_TLS_DHE_PSK_WITH_AES_256_CBC_SHA,
http2cipher_TLS_RSA_PSK_WITH_RC4_128_SHA,
http2cipher_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_RSA_PSK_WITH_AES_128_CBC_SHA,
http2cipher_TLS_RSA_PSK_WITH_AES_256_CBC_SHA,
http2cipher_TLS_RSA_WITH_SEED_CBC_SHA,
http2cipher_TLS_DH_DSS_WITH_SEED_CBC_SHA,
http2cipher_TLS_DH_RSA_WITH_SEED_CBC_SHA,
http2cipher_TLS_DHE_DSS_WITH_SEED_CBC_SHA,
http2cipher_TLS_DHE_RSA_WITH_SEED_CBC_SHA,
http2cipher_TLS_DH_anon_WITH_SEED_CBC_SHA,
http2cipher_TLS_RSA_WITH_AES_128_GCM_SHA256,
http2cipher_TLS_RSA_WITH_AES_256_GCM_SHA384,
http2cipher_TLS_DH_RSA_WITH_AES_128_GCM_SHA256,
http2cipher_TLS_DH_RSA_WITH_AES_256_GCM_SHA384,
http2cipher_TLS_DH_DSS_WITH_AES_128_GCM_SHA256,
http2cipher_TLS_DH_DSS_WITH_AES_256_GCM_SHA384,
http2cipher_TLS_DH_anon_WITH_AES_128_GCM_SHA256,
http2cipher_TLS_DH_anon_WITH_AES_256_GCM_SHA384,
http2cipher_TLS_PSK_WITH_AES_128_GCM_SHA256,
http2cipher_TLS_PSK_WITH_AES_256_GCM_SHA384,
http2cipher_TLS_RSA_PSK_WITH_AES_128_GCM_SHA256,
http2cipher_TLS_RSA_PSK_WITH_AES_256_GCM_SHA384,
http2cipher_TLS_PSK_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_PSK_WITH_AES_256_CBC_SHA384,
http2cipher_TLS_PSK_WITH_NULL_SHA256,
http2cipher_TLS_PSK_WITH_NULL_SHA384,
http2cipher_TLS_DHE_PSK_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_DHE_PSK_WITH_AES_256_CBC_SHA384,
http2cipher_TLS_DHE_PSK_WITH_NULL_SHA256,
http2cipher_TLS_DHE_PSK_WITH_NULL_SHA384,
http2cipher_TLS_RSA_PSK_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_RSA_PSK_WITH_AES_256_CBC_SHA384,
http2cipher_TLS_RSA_PSK_WITH_NULL_SHA256,
http2cipher_TLS_RSA_PSK_WITH_NULL_SHA384,
http2cipher_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256,
http2cipher_TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256,
http2cipher_TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256,
http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256,
http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256,
http2cipher_TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256,
http2cipher_TLS_EMPTY_RENEGOTIATION_INFO_SCSV,
http2cipher_TLS_ECDH_ECDSA_WITH_NULL_SHA,
http2cipher_TLS_ECDH_ECDSA_WITH_RC4_128_SHA,
http2cipher_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA,
http2cipher_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA,
http2cipher_TLS_ECDHE_ECDSA_WITH_NULL_SHA,
http2cipher_TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
http2cipher_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
http2cipher_TLS_ECDH_RSA_WITH_NULL_SHA,
http2cipher_TLS_ECDH_RSA_WITH_RC4_128_SHA,
http2cipher_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA,
http2cipher_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA,
http2cipher_TLS_ECDHE_RSA_WITH_NULL_SHA,
http2cipher_TLS_ECDHE_RSA_WITH_RC4_128_SHA,
http2cipher_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
http2cipher_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
http2cipher_TLS_ECDH_anon_WITH_NULL_SHA,
http2cipher_TLS_ECDH_anon_WITH_RC4_128_SHA,
http2cipher_TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_ECDH_anon_WITH_AES_128_CBC_SHA,
http2cipher_TLS_ECDH_anon_WITH_AES_256_CBC_SHA,
http2cipher_TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_SRP_SHA_WITH_AES_128_CBC_SHA,
http2cipher_TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA,
http2cipher_TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA,
http2cipher_TLS_SRP_SHA_WITH_AES_256_CBC_SHA,
http2cipher_TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA,
http2cipher_TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA,
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
http2cipher_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384,
http2cipher_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
http2cipher_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384,
http2cipher_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256,
http2cipher_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384,
http2cipher_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256,
http2cipher_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384,
http2cipher_TLS_ECDHE_PSK_WITH_RC4_128_SHA,
http2cipher_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA,
http2cipher_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA,
http2cipher_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA,
http2cipher_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256,
http2cipher_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384,
http2cipher_TLS_ECDHE_PSK_WITH_NULL_SHA,
http2cipher_TLS_ECDHE_PSK_WITH_NULL_SHA256,
http2cipher_TLS_ECDHE_PSK_WITH_NULL_SHA384,
http2cipher_TLS_RSA_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_RSA_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_DH_anon_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_DH_anon_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_RSA_WITH_ARIA_128_GCM_SHA256,
http2cipher_TLS_RSA_WITH_ARIA_256_GCM_SHA384,
http2cipher_TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256,
http2cipher_TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384,
http2cipher_TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256,
http2cipher_TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384,
http2cipher_TLS_DH_anon_WITH_ARIA_128_GCM_SHA256,
http2cipher_TLS_DH_anon_WITH_ARIA_256_GCM_SHA384,
http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256,
http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384,
http2cipher_TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256,
http2cipher_TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384,
http2cipher_TLS_PSK_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_PSK_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_PSK_WITH_ARIA_128_GCM_SHA256,
http2cipher_TLS_PSK_WITH_ARIA_256_GCM_SHA384,
http2cipher_TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256,
http2cipher_TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384,
http2cipher_TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256,
http2cipher_TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384,
http2cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384,
http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384,
http2cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384,
http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384,
http2cipher_TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256,
http2cipher_TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384,
http2cipher_TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256,
http2cipher_TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384,
http2cipher_TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256,
http2cipher_TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384,
http2cipher_TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256,
http2cipher_TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384,
http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256,
http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384,
http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256,
http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384,
http2cipher_TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256,
http2cipher_TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384,
http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256,
http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384,
http2cipher_TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384,
http2cipher_TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384,
http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384,
http2cipher_TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256,
http2cipher_TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384,
http2cipher_TLS_RSA_WITH_AES_128_CCM,
http2cipher_TLS_RSA_WITH_AES_256_CCM,
http2cipher_TLS_RSA_WITH_AES_128_CCM_8,
http2cipher_TLS_RSA_WITH_AES_256_CCM_8,
http2cipher_TLS_PSK_WITH_AES_128_CCM,
http2cipher_TLS_PSK_WITH_AES_256_CCM,
http2cipher_TLS_PSK_WITH_AES_128_CCM_8,
http2cipher_TLS_PSK_WITH_AES_256_CCM_8:
return true
default:
return false
}
}
// ClientConnPool manages a pool of HTTP/2 client connections.
type http2ClientConnPool interface {
// GetClientConn returns a specific HTTP/2 connection (usually
// a TLS-TCP connection) to an HTTP/2 server. On success, the
// returned ClientConn accounts for the upcoming RoundTrip
// call, so the caller should not omit it. If the caller needs
// to, ClientConn.RoundTrip can be called with a bogus
// new(http.Request) to release the stream reservation.
GetClientConn(req *Request, addr string) (*http2ClientConn, error)
MarkDead(*http2ClientConn)
}
// clientConnPoolIdleCloser is the interface implemented by ClientConnPool
// implementations which can close their idle connections.
type http2clientConnPoolIdleCloser interface {
http2ClientConnPool
closeIdleConnections()
}
var (
_ http2clientConnPoolIdleCloser = (*http2clientConnPool)(nil)
_ http2clientConnPoolIdleCloser = http2noDialClientConnPool{}
)
// TODO: use singleflight for dialing and addConnCalls?
type http2clientConnPool struct {
t *http2Transport
mu sync.Mutex // TODO: maybe switch to RWMutex
// TODO: add support for sharing conns based on cert names
// (e.g. share conn for googleapis.com and appspot.com)
conns map[string][]*http2ClientConn // key is host:port
dialing map[string]*http2dialCall // currently in-flight dials
keys map[*http2ClientConn][]string
addConnCalls map[string]*http2addConnCall // in-flight addConnIfNeeded calls
}
func (p *http2clientConnPool) GetClientConn(req *Request, addr string) (*http2ClientConn, error) {
return p.getClientConn(req, addr, http2dialOnMiss)
}
const (
http2dialOnMiss = true
http2noDialOnMiss = false
)
func (p *http2clientConnPool) getClientConn(req *Request, addr string, dialOnMiss bool) (*http2ClientConn, error) {
// TODO(dneil): Dial a new connection when t.DisableKeepAlives is set?
if http2isConnectionCloseRequest(req) && dialOnMiss {
// It gets its own connection.
http2traceGetConn(req, addr)
const singleUse = true
cc, err := p.t.dialClientConn(req.Context(), addr, singleUse)
if err != nil {
return nil, err
}
return cc, nil
}
for {
p.mu.Lock()
for _, cc := range p.conns[addr] {
if cc.ReserveNewRequest() {
// When a connection is presented to us by the net/http package,
// the GetConn hook has already been called.
// Don't call it a second time here.
if !cc.getConnCalled {
http2traceGetConn(req, addr)
}
cc.getConnCalled = false
p.mu.Unlock()
return cc, nil
}
}
if !dialOnMiss {
p.mu.Unlock()
return nil, http2ErrNoCachedConn
}
http2traceGetConn(req, addr)
call := p.getStartDialLocked(req.Context(), addr)
p.mu.Unlock()
<-call.done
if http2shouldRetryDial(call, req) {
continue
}
cc, err := call.res, call.err
if err != nil {
return nil, err
}
if cc.ReserveNewRequest() {
return cc, nil
}
}
}
// dialCall is an in-flight Transport dial call to a host.
type http2dialCall struct {
_ http2incomparable
p *http2clientConnPool
// the context associated with the request
// that created this dialCall
ctx context.Context
done chan struct{} // closed when done
res *http2ClientConn // valid after done is closed
err error // valid after done is closed
}
// requires p.mu is held.
func (p *http2clientConnPool) getStartDialLocked(ctx context.Context, addr string) *http2dialCall {
if call, ok := p.dialing[addr]; ok {
// A dial is already in-flight. Don't start another.
return call
}
call := &http2dialCall{p: p, done: make(chan struct{}), ctx: ctx}
if p.dialing == nil {
p.dialing = make(map[string]*http2dialCall)
}
p.dialing[addr] = call
go call.dial(call.ctx, addr)
return call
}
// run in its own goroutine.
func (c *http2dialCall) dial(ctx context.Context, addr string) {
const singleUse = false // shared conn
c.res, c.err = c.p.t.dialClientConn(ctx, addr, singleUse)
c.p.mu.Lock()
delete(c.p.dialing, addr)
if c.err == nil {
c.p.addConnLocked(addr, c.res)
}
c.p.mu.Unlock()
close(c.done)
}
// addConnIfNeeded makes a NewClientConn out of c if a connection for key doesn't
// already exist. It coalesces concurrent calls with the same key.
// This is used by the http1 Transport code when it creates a new connection. Because
// the http1 Transport doesn't de-dup TCP dials to outbound hosts (because it doesn't know
// the protocol), it can get into a situation where it has multiple TLS connections.
// This code decides which ones live or die.
// The return value used is whether c was used.
// c is never closed.
func (p *http2clientConnPool) addConnIfNeeded(key string, t *http2Transport, c *tls.Conn) (used bool, err error) {
p.mu.Lock()
for _, cc := range p.conns[key] {
if cc.CanTakeNewRequest() {
p.mu.Unlock()
return false, nil
}
}
call, dup := p.addConnCalls[key]
if !dup {
if p.addConnCalls == nil {
p.addConnCalls = make(map[string]*http2addConnCall)
}
call = &http2addConnCall{
p: p,
done: make(chan struct{}),
}
p.addConnCalls[key] = call
go call.run(t, key, c)
}
p.mu.Unlock()
<-call.done
if call.err != nil {
return false, call.err
}
return !dup, nil
}
type http2addConnCall struct {
_ http2incomparable
p *http2clientConnPool
done chan struct{} // closed when done
err error
}
func (c *http2addConnCall) run(t *http2Transport, key string, tc *tls.Conn) {
cc, err := t.NewClientConn(tc)
p := c.p
p.mu.Lock()
if err != nil {
c.err = err
} else {
cc.getConnCalled = true // already called by the net/http package
p.addConnLocked(key, cc)
}
delete(p.addConnCalls, key)
p.mu.Unlock()
close(c.done)
}
// p.mu must be held
func (p *http2clientConnPool) addConnLocked(key string, cc *http2ClientConn) {
for _, v := range p.conns[key] {
if v == cc {
return
}
}
if p.conns == nil {
p.conns = make(map[string][]*http2ClientConn)
}
if p.keys == nil {
p.keys = make(map[*http2ClientConn][]string)
}
p.conns[key] = append(p.conns[key], cc)
p.keys[cc] = append(p.keys[cc], key)
}
func (p *http2clientConnPool) MarkDead(cc *http2ClientConn) {
p.mu.Lock()
defer p.mu.Unlock()
for _, key := range p.keys[cc] {
vv, ok := p.conns[key]
if !ok {
continue
}
newList := http2filterOutClientConn(vv, cc)
if len(newList) > 0 {
p.conns[key] = newList
} else {
delete(p.conns, key)
}
}
delete(p.keys, cc)
}
func (p *http2clientConnPool) closeIdleConnections() {
p.mu.Lock()
defer p.mu.Unlock()
// TODO: don't close a cc if it was just added to the pool
// milliseconds ago and has never been used. There's currently
// a small race window with the HTTP/1 Transport's integration
// where it can add an idle conn just before using it, and
// somebody else can concurrently call CloseIdleConns and
// break some caller's RoundTrip.
for _, vv := range p.conns {
for _, cc := range vv {
cc.closeIfIdle()
}
}
}
func http2filterOutClientConn(in []*http2ClientConn, exclude *http2ClientConn) []*http2ClientConn {
out := in[:0]
for _, v := range in {
if v != exclude {
out = append(out, v)
}
}
// If we filtered it out, zero out the last item to prevent
// the GC from seeing it.
if len(in) != len(out) {
in[len(in)-1] = nil
}